audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Brake Master Cylinder > < Mechanical Specifications|Page 3442
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CAUTION:
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The ABS hydraulic unit cannot be serviced in any way except to replace the relays. Never loosen screws or bolts.

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Replace the ABS hydraulic unit as a complete assembly only, if necessary.

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Perform pressure testing, refer to High And Low Pressure Testing. See: Testing and Inspection

10

Brake Master Cylinder
-

With brake booster

Procedure

Fig. 1 Relay Locations

a - Return Flow Pump Relay
b - Solenoid Valve Relay

Brake Master Cylinder > < Mechanical Specifications|Page 3442